I need to measure the frequency output of three Yokogawa AXFA14G flowmeter and a speed pickup using a cDAQ module and 9188 chassis. I am unsure of the best module and the correct wiring.
The Yokogawa meters that I have can provide a passive pulse output. I have attached the wiring diagram. The power supply must be less than 30VDC and 0.2A. I expect to see frequencies up to 11,000Hz.
I also need to measure a speed pickup. The speed pickup has three wires: The power supply 5 to 15 VDC, the output signal (5V TTL) and the common wire. I expect to see frequencies up to 4,000Hz.
I would like to read three flow meters and the speed pickup with one cDAQ module. I would also like to power all four devices with one power supply. I am unsure if the devices are considered sinking or sourcing. I am unsure of the correct module and the correct wiring.
My options appear to be:
NI 9401. Powering flow meters and speed pickup with a 5 volt supply
NI 9411. Has a built in regulator. I would have to be able to measure both device types as signgle ended.
If I only measure the flowmeters, I could consider using the 9423 (if the flowmeters are (sinking).
